So there a problem with the medic vans where the yellow van skins shows up yellow only for you but for others including medics its shows the IDAP skin which is weird.
Top pic is what it looks like for you:
Bottom pic is what it is for others:

Well usually if that happens you save a recording of it occurring then submit a compensation request with the vehicle or items you lost to get it retrieved back.
http://thedarksidegames.invisionzone.com/forum/72-compensation-requests/